551505972 has 12 divisors (see below), whose sum is σ = 1286847296. Its totient is φ = 183835320.

The previous prime is 551505971. The next prime is 551505973. The reversal of 551505972 is 279505155.

It is an interprime number because it is at equal distance from previous prime (551505971) and next prime (551505973).

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 551505972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551505971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22979404 + ... + 22979427.

Almost surely, 2^551505972 is an apocalyptic number.

It is an amenable number.

551505972 is an abundant number, since it is smaller than the sum of its proper divisors (735341324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551505972 is a wasteful number, since it uses less digits than its factorization.

551505972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45958838 (or 45958836 counting only the distinct ones).

The product of its (nonzero) digits is 78750, while the sum is 39.

The square root of 551505972 is about 23484.1642814898. The cubic root of 551505972 is about 820.0683920747.

The spelling of 551505972 in words is "five hundred fifty-one million, five hundred five thousand, nine hundred seventy-two".